<!DOCTYPE html>
<html>
	<head>
		<meta charset="UTF-8">
		<title></title>
	</head>
	<body>
		<script src="https://unpkg.com/vue/dist/vue.js"></script>
		<script>
			var data={a:1};
			var vm=new Vue({
				data:data
			})
			vm.a===data.a;
			vm.a=2
			console.log(data.a)
			data.a=3
			console.log(vm.a)
		</script>
	</body>
</html>

